Joele Frank is handling Blackbaud, the Charleston-based $1.1B marketer of software designed to empower social impact, as it fends off an unsolicited takeover bid from Clearlake Capital Group.

The $71 per share offer is a 25.9 percent premium over the 30-day average trading price of Blackbaud’s stock for the period ended March 24.

Blackbaud’s board has determined that the proposal is highly opportunistic and significantly undervalues the company.

Chairman Andrew Leitch called the bid an overt attempt to put Blackbaud in play.

Non-profits and educational institutions use Blackbaud’s software for fundraising, grantmaking and financial management.

Joele Frank, Wilkinson Brimmer Katcher’s Jamie Moser and Nick Lamplough represent Blackbaud.

Lambert’s Jennifer Hurson is working for Clearlake Capital Group, which is headquartered in Santa Monica.